Book/Report

FZJ-2018-03868

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Entwicklung, Test und Simulation einer Influenzdriftkammer

Lippert, C. (Corresponding author)FZJ*

1992
Forschungszentrum Jülich GmbH Zentralbibliothek Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/19191

Report No.: Juel-2646

Abstract: The experiment PS185 measuring the reaction $\overline{p}p \rightarrow \overline{Y}Y$ with strangeness S = 1 hyperons is a unique tool to study the process of $\overline{s}s$ quark pair creation. The so far measured $\overline{\Delta}\Delta$ and $\overline{\Delta}\sum^{0}$ channels have stimulated a lot of theoreticalwork and will be complemented hy the charged $\sum$-chanrtels $\overline{\sum}^{+}\sum^{+}$ and $\overline{\sum}^{-}\sum^{-}$. Therefore, the PS185 apparatus has to be extended hy a micro vertex detector with good spatial resolution and high rate capability. Last years in Jülich such a detector, the Induction Drift Chamber, was developed. A wire plane consists of alternating potential wires (20 $\mu$m) and anodes (7 $\mu$m) asymmetrically positioned between two cathode foils defining one independent chamber. The good track resolution ($\le$ 25 $\mu$m ) for perpendicular tracks even for high rates ($\geq$ 10$^{6}$ events / (sec $\cdot$ mm$^{2}$) is achieved by evaluate the induced signals of the potential wires, which measure the azimuthal avalanche position with respect to the anodes. An expression is derived to describe the principles of the induced signals so that the simulation of the IDC is in good agreement with the experimental data. One central point is the derivation of an algorithm for inclined tracks. To overcome liinits in the spatial resolution which arise from the fluctuation of ionisation loss, aFlash-ADC real out was used, which also gives the possibility to digitalize the track inside one plane. For the 400 channels in two FADC-Crates a real time data acquisition system with interrupt processing was developed on a VME-processor so that an event rate $\geq$ 100 Hz by an event length $\geq$ 1 kByte could be reached. The mechanical construction of the IDC allows a stack of independent planes to he built with a height of 3.5 mm for each. Results of two fest runs measuring the spatial resolution are reported.

---

Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

---

Database coverage:

---